John Campbell Elliott, PC (August 25, 1872 – December 20, 1941) was a Canadian lawyer and politician.

In 1919, he ran in the first Ontario Liberal Party leadership convention, coming in a poor third, and left provincial politics shortly afterwards.

In March 1926, he was appointed to the Canadian Cabinet by William Lyon Mackenzie King as Minister of Labour.

In September of that year, he was moved to the position of Minister of Public Works, and remained in that portfolio until the Liberal government's defeat in the 1930 election.

Elliott was personally re-elected and sat on the Opposition benches until the Liberals returned to power in the 1935 election.